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## Department: Important Questions, Answers TamilNadu State Board

**Physics 11th std**

## Online Study Material, Lecturing Notes, Assignment, Reference, Wiki and important questions and answers

**Chapter 1 Nature of Physical World and Measurement**

** -:- ** Science Introduction ** -:- ** Physics: Introduction ** -:- ** Branches of Physics ** -:- ** Scope and Excitement of Physics ** -:- ** Physics in Relation to Technology and Society ** -:- ** Measurement ** -:- ** Definition and Types of Physical Quantity ** -:- ** SI unit System ** -:- ** Measurement of Basic Quantities ** -:- ** Measurement of length ** -:- ** Solved Example Problems for Measurement of length ** -:- ** Measurement of mass ** -:- ** Measurement of Time intervals ** -:- ** Theory of Errors ** -:- ** Accuracy and Precision ** -:- ** Errors in Measurement ** -:- ** Error Analysis ** -:- ** Solved Example Problems for Error Analysis ** -:- ** Propagation of errors ** -:- ** Solved Example Problems for Propagation of errors ** -:- ** Significant Figures ** -:- ** Solved Example Problems for Significant Figures ** -:- ** Dimensional Analysis ** -:- ** Dimension of Physical Quantities ** -:- ** Dimensional Quantities, Dimensionless Quantities, Principle of Homogeneity ** -:- ** Application and Limitations of the Method of Dimensional Analysis ** -:- ** Solved Example Problems for Application of the Method of Dimensional Analysis ** -:- ** Summary - Nature of Physical World and Measurement ** -:- ** Solved Example Problems for Physics: Nature of Physical World and Measurement**Chapter 2 Kinematics**

** -:- ** Kinematics ** -:- ** Concept of Rest and Motion ** -:- ** Types of motion ** -:- ** Motion in One, Two and Three Dimensions ** -:- ** Elementary Concepts of Vector Algebra ** -:- ** Magnitude of a Vector ** -:- ** Different types of Vectors ** -:- ** Addition of Vectors (Triangular Law of addition method) ** -:- ** Subtraction of vectors ** -:- ** Solved Example Problem for Addition and Subtraction of Vectors ** -:- ** Components of a Vector ** -:- ** Vector addition using components ** -:- ** Solved Example Problem for Components of a Vector and Vector addition using components ** -:- ** Multiplication of Vector by a Scalar ** -:- ** Scalar Product of Two Vectors ** -:- ** The Vector Product of Two Vectors ** -:- ** Properties of the components of vectors ** -:- ** Solved Example Problems for Multiplication of Vector by a Scalar ** -:- ** Position Vector ** -:- ** Solved Example Problems for Position Vector ** -:- ** Distance and Displacement ** -:- ** Displacement Vector in Cartesian Coordinate System ** -:- ** Solved Example Problems for Distance and Displacement ** -:- ** Differential Calculus ** -:- ** Solved Example Problems for Differential Calculus ** -:- ** Integral Calculus ** -:- ** Integral Calculus: Average velocity, Average speed, velocity, Momentum ** -:- ** Solved Example Problem for Integral Calculus: Average speed, velocity, Momentum ** -:- ** Motion along One Dimension ** -:- ** Average velocity ** -:- ** Solved Example Problems for Average velocity ** -:- ** Relative Velocity in One and Two Dimensional Motion ** -:- ** Solved Example Problems for Relative Velocity in One and Two Dimensional Motion ** -:- ** Equations of Uniformly Accelerated Motion by Calculus Method ** -:- ** Solved Example Problems for Accelerated Motion ** -:- ** Equations of motion under gravity ** -:- ** Solved Example Problem for Equations of motion under gravity ** -:- ** Solved Example Problem for Motion along One Dimension ** -:- ** Projectile Motion ** -:- ** Projectile in horizontal projection ** -:- ** Projectile under an angular projection ** -:- ** Introduction to Degrees and Radians ** -:- ** Solved Example Problems for Degrees and Radians ** -:- ** Angular displacement in Projectile Motion ** -:- ** Circular Motion ** -:- ** Solved Example Problems for Circular Motion ** -:- ** Solved Example Problems for Projectile Motion ** -:- ** Solved Example Problem for Physics: Kinematics**Chapter 3 Laws of Motion**

** -:- ** Laws of Motion ** -:- ** Newton’s Law ** -:- ** Newton’s First Law ** -:- ** Newton's Second Law ** -:- ** Newton’s Third Law ** -:- ** Discussion on Newton’s Laws ** -:- ** Application of Newton’s Laws ** -:- ** Solved Example Problems on Application of Newton’s Laws ** -:- ** Application of Newton’s Laws: Particle Moving in an Inclined Plane ** -:- ** Application of Newton’s Laws: Two Bodies in Contact on a Horizontal Surface ** -:- ** Application of Newton’s Laws: Motion of Connected Bodies ** -:- ** Application of Newton’s Laws: Concurrent Forces and Lami’s Theorem ** -:- ** Lami’s Theorem ** -:- ** Solved Example Problems on Application of Lami’s Theorem ** -:- ** Law of Conservation of Total Linear Momentum ** -:- ** Solved Example Problems on Law of Conservation of Total Linear Momentum ** -:- ** Impulsive force or Impulse ** -:- ** Solved Example Problems on Impulsive force or Impulse ** -:- ** Friction ** -:- ** Static Friction ** -:- ** Kinetic Friction ** -:- ** To Move an Object - Push or pull? Which is easier? ** -:- ** Angle of Friction ** -:- ** Angle of Repose ** -:- ** Application of Angle of Repose ** -:- ** Rolling Friction ** -:- ** Methods to Reduce Friction ** -:- ** Solved Example Problems for Friction ** -:- ** Dynamics of Circular Motion ** -:- ** Centripetal force ** -:- ** Solved Example Problems for Centripetal force ** -:- ** Vehicle on a leveled circular road ** -:- ** Solved Example Problems for Vehicle on a leveled circular road ** -:- ** Banking of Tracks ** -:- ** Solved Example Problems for Banking of Tracks ** -:- ** Centrifugal Force ** -:- ** Effects of Centrifugal Force ** -:- ** Centrifugal Force due to Rotation of the Earth ** -:- ** Solved Example Problems for Centrifugal Force due to Rotation of the Earth ** -:- ** Centripetal Force Versus Centrifugal Force ** -:- ** Solved Example Problems for Dynamics of Circular Motion ** -:- ** Physics Laws of Motion: Summary ** -:- ** Solved Example Problems for Physics: Laws of Motion**Chapter 4 Work Energy and Power**

** -:- ** Work, Energy and Power ** -:- ** Work ** -:- ** Work done by a constant force ** -:- ** Work done by a variable force ** -:- ** Solved Example Problems for Work and Work done by a force ** -:- ** Energy ** -:- ** Kinetic energy ** -:- ** Work-Kinetic Energy Theorem ** -:- ** Relation between Momentum and Kinetic Energy ** -:- ** Solved Example Problems for Kinetic energy ** -:- ** Potential Energy ** -:- ** Solved Example Problems for Potential Energy ** -:- ** Potential energy near the surface of the Earth ** -:- ** Elastic Potential Energy ** -:- ** Solved Example Problems for Elastic Potential Energy ** -:- ** Conservative and non-conservative forces ** -:- ** Solved Example Problems for Conservative and nonconservative forces ** -:- ** Law of conservation of energy ** -:- ** Solved Example Problems for Law of conservation of energy ** -:- ** Motion in a vertical circle ** -:- ** Solved Example Problems for Motion in a vertical circle ** -:- ** Solved Example Problems for Energy ** -:- ** Power ** -:- ** Unit of power ** -:- ** Relation between power and velocity ** -:- ** Solved Example Problems for power ** -:- ** Collisions ** -:- ** Types of Collisions ** -:- ** Elastic collisions in one dimension ** -:- ** Solved Example Problems for Elastic collisions in one dimension ** -:- ** Perfect inelastic collision ** -:- ** Solved Example Problems for Perfect inelastic collision ** -:- ** Loss of kinetic energy in perfect inelastic collision ** -:- ** Coefficient of restitution (e) ** -:- ** Solved Example Problems for Coefficient of restitution (e) ** -:- ** Solved Example Problems for Collision ** -:- ** Solved Example Problems for Physics: Work, Energy and Power**Chapter 5 Motion of System of Particles and Rigid Bodies**

** -:- ** Motion of System of Particles and Rigid Bodies ** -:- ** Center of Mass ** -:- ** Center of Mass of a Rigid Body ** -:- ** Center of Mass for Distributed Point Masses ** -:- ** Center of Mass of Two Point Masses ** -:- ** Solved Example Problems for Center of Mass of Two Point Masses ** -:- ** Center of mass for uniform distribution of mass ** -:- ** Solved Example Problems for Center of mass for uniform distribution of mass ** -:- ** Motion of Center of Mass ** -:- ** Solved Example Problems for Motion of Center of Mass ** -:- ** Solved Example Problems for Center of Mass ** -:- ** Torque and Angular Momentum ** -:- ** Torque and Definition of Torque ** -:- ** Torque about an Axis ** -:- ** Torque and Angular Acceleration ** -:- ** Solved Example Problems for Torque ** -:- ** Angular Momentum ** -:- ** Angular Momentum and Angular Velocity ** -:- ** Torque and Angular Momentum - Final Derivation ** -:- ** Solved Example Problems for Angular Momentum ** -:- ** Equilibrium of Rigid Bodies ** -:- ** Types of Equilibrium ** -:- ** Solved Example Problems for Equilibrium of Rigid Bodies ** -:- ** Couple ** -:- ** Principle of Moments ** -:- ** Center of Gravity ** -:- ** Bending of Cyclist in Curves ** -:- ** Solved Example Problems for Bending of Cyclist in Curves ** -:- ** Moment of Inertia ** -:- ** Moment of Inertia of a Uniform Rod ** -:- ** Solved Example Problems for Moment of Inertia of a Uniform Rod ** -:- ** Moment of Inertia of a Uniform Ring ** -:- ** Moment of Inertia of a Uniform Disc ** -:- ** Radius of Gyration ** -:- ** Solved Example Problems for Radius of Gyration ** -:- ** Theorems of Moment of Inertia ** -:- ** Solved Example Problems for Theorems of Moment of Inertia ** -:- ** Moment of Inertia of Different Rigid Bodies ** -:- ** Rotational Dynamics ** -:- ** Effect of Torque on Rigid Bodies ** -:- ** Solved Example Problems for Effect of Torque on Rigid Bodies ** -:- ** Conservation of Angular Momentum ** -:- ** Solved Example Problems for Conservation of Angular Momentum ** -:- ** Work done by Torque ** -:- ** Kinetic Energy in Rotation ** -:- ** Solved Example Problems for Kinetic Energy in Rotation ** -:- ** Power Delivered by Torque ** -:- ** Comparison of Translational and Rotational Quantities ** -:- ** Rolling Motion ** -:- ** Combination of Translation and Rotation ** -:- ** Slipping and Sliding ** -:- ** Solved Example Problems for Slipping and Sliding(Rolling Motion) ** -:- ** Kinetic Energy in Pure Rolling ** -:- ** Solved Example Problems for Kinetic Energy in Pure Rolling(Rolling Motion) ** -:- ** Rolling on Inclined Plane ** -:- ** Solved Example Problems for Rolling on Inclined Plane(Rolling Motion) ** -:- ** Summary - Physics: Motion of System of Particles and Rigid Bodies ** -:- ** Solved Example Problems for Physics: Motion of System of Particles and Rigid Bodies**Chapter 6 Gravitation**

** -:- ** Universal Law of Gravitation ** -:- ** Solved Example Problems for Universal Law of Gravitation ** -:- ** Gravitational Constant ** -:- ** Gravitational field ** -:- ** Superposition principle for Gravitational field ** -:- ** Solved Example Problems: Superposition principle for Gravitational field ** -:- ** Gravitational Potential Energy ** -:- ** Gravitational potential energy near the surface of the Earth ** -:- ** Gravitational potential V(r) ** -:- ** Solved Example Problems for Gravitational potential V(r) ** -:- ** Acceleration Due to Gravity of the Earth ** -:- ** Variation of g(acceleration of gravity) with altitude, depth and latitude ** -:- ** Solved Example Problems for Acceleration Due to Gravity of the Earth ** -:- ** Escape Speed and Orbital Speed ** -:- ** Satellites, orbital speed and time period ** -:- ** Energy of an Orbiting Satellite ** -:- ** Geo-stationary and polar satellite ** -:- ** Weightlessness Weight of an object - Escape Speed and Orbital Speed ** -:- ** Solved Example Problems for Escape Speed and Orbital Speed ** -:- ** Elementary Ideas of Astronomy ** -:- ** Heliocentric system over geocentric system ** -:- ** Kepler’s Third Law and The Astronomical Distance ** -:- ** Measurement of radius of the Earth ** -:- ** Interesting Astronomical Facts ** -:- ** Recent developments of astronomy and gravitation ** -:- ** Summary - Physics: Gravitation ** -:- ** Solved Example Problems for Physics: Gravitation ** -:- ** Multiple Choice Questions - Physics: Gravitation**Chapter 7 Properties of Matter**

** -:- ** Properties of Matter: Introduction ** -:- ** Microscopic Understanding of Various States of Matter ** -:- ** Elastic behaviour of materials ** -:- ** Stress and strain ** -:- ** Hooke’s law and its experimental verification ** -:- ** Moduli of elasticity ** -:- ** Solved Example Problems for Moduli of elasticity ** -:- ** Poisson’s ratio ** -:- ** Elastic energy ** -:- ** Solved Example Problems for Elastic energy ** -:- ** Applications of elasticity ** -:- ** Fluids: Introduction ** -:- ** Pressure due to fluid column at rest ** -:- ** Pascal’s law and its applications ** -:- ** Solved Example Problems for Pascal’s law ** -:- ** Buoyancy ** -:- ** Solved Example Problems for Buoyancy ** -:- ** Solved Example Problems for Fluids ** -:- ** Viscosity ** -:- ** Streamlined flow - Viscosity ** -:- ** Turbulent flow - Viscosity ** -:- ** Reynold’s number ** -:- ** Terminal velocity - Viscosity ** -:- ** Stoke’s law and its applications ** -:- ** Poiseuille’s equation ** -:- ** Applications of viscosity ** -:- ** Solved Example Problems for Viscosity ** -:- ** Surface Tension: Intermolecular forces ** -:- ** Factors affecting the surface tension of a liquid ** -:- ** Surface energy (S.E.) and surface tension (S.T.) ** -:- ** Surface tension: Angle of contact ** -:- ** Excess of pressure inside a liquid drop, a soap bubble, and an air bubble ** -:- ** Capillarity ** -:- ** Surface Tension by capillary rise method ** -:- ** Applications of surface tension ** -:- ** Solved Example Problems for Surface tension ** -:- ** Bernoulli’s Theorem ** -:- ** Equation of continuity ** -:- ** Pressure, kinetic and potential energy of liquids ** -:- ** Bernoulli’s theorem and its applications ** -:- ** Applications of Bernoulli’s Theorem ** -:- ** Solved Example Problems for Bernoulli’s Theorem, Equation of continuity ** -:- ** Summary - Physics: Properties of Matter ** -:- ** Solved Example Problems for Physics : Properties of Matter ** -:- ** Multiple Choice Questions - Physics: Properties of Matter**Chapter 8 Heat and Thermodynamics**

** -:- ** Heat and Thermodynamics: Introduction ** -:- ** Meaning of heat ** -:- ** Meaning of work ** -:- ** Meaning of temperature ** -:- ** Boyle’s law, Charles’ law and ideal gas law - Thermal Properties of Matter ** -:- ** Solved Example Problems for Boyle’s law, Charles’ law and ideal gas law ** -:- ** Heat capacity and specific heat capacity - Thermal Properties of Matter ** -:- ** Thermal expansion of solids, liquids and gases ** -:- ** Solved Example Problems for Thermal expansion of solids, liquids and gases ** -:- ** Anomalous expansion of water ** -:- ** Change of state ** -:- ** Calorimetry ** -:- ** Solved Example Problems for Calorimetry ** -:- ** Heat transfer ** -:- ** Newton’s law of cooling ** -:- ** Solved Example Problems for Newton’s law of cooling ** -:- ** Laws of Heat Transfer ** -:- ** Prevost theory of heat exchange - Laws of Heat Transfer ** -:- ** Stefan Boltzmann law - Laws of Heat Transfer ** -:- ** Wien’s displacement law - Laws of Heat Transfer ** -:- ** Solved Example Problems for Laws of Heat Transfer ** -:- ** Thermodynamics ** -:- ** Zeroth Law of Thermodynamics ** -:- ** Internal Energy (U) ** -:- ** Joule’s mechanical equivalent of heat ** -:- ** First law of thermodynamics ** -:- ** Quasi-static process ** -:- ** Work done in volume changes - Internal Energy (U) ** -:- ** PV diagram - Internal Energy (U) ** -:- ** Solved Example Problems for Internal Energy (U) ** -:- ** Specific Heat Capacity of a Gas ** -:- ** Meyer’s relation ** -:- ** Isothermal process ** -:- ** Solved Example Problems for Isothermal process ** -:- ** Adiabatic process ** -:- ** Solved Example Problems for Adiabatic process ** -:- ** Isobaric process ** -:- ** Solved Example Problems for Isobaric process ** -:- ** Isochoric process ** -:- ** Solved Example Problems for Isochoric process ** -:- ** Cyclic processes and PV diagram for a cyclic process ** -:- ** Solved Example Problems for Thermodynamics Cyclic processes ** -:- ** Limitations of first law of thermodynamics ** -:- ** Reversible process - Thermodynamics ** -:- ** Solved Example Problems for Thermodynamics Reversible process ** -:- ** Solved Example Problems for Thermodynamic Processes ** -:- ** Heat Engine ** -:- ** Carnot’s ideal heat engine ** -:- ** Efficiency of a Carnot engine ** -:- ** Entropy and second law of thermodynamics ** -:- ** Solved Example Problems for Heat Engine ** -:- ** Refrigerator ** -:- ** Solved Example Problems for Refrigerator ** -:- ** Green House Effect ** -:- ** Summary - Physics: Heat and Thermodynamics ** -:- ** Solved Example Problems for Physics : Heat and Thermodynamics ** -:- ** Multiple Choice Questions - Physics: Heat and Thermodynamics**Chapter 9 Kinetic Theory of Gases**

** -:- ** Kinetic Theory of Gases ** -:- ** Postulates of kinetic theory of gases ** -:- ** Expression for pressure exerted by a gas ** -:- ** Kinetic interpretation of temperature ** -:- ** Relation between pressure and mean kinetic energy ** -:- ** Some elementary deductions from kinetic theory of gases ** -:- ** Root mean square speed ** -:- ** Mean (or) average speed ** -:- ** Most probable speed ** -:- ** Maxwell-Boltzmann speed distribution function ** -:- ** Solved Example Problems: Expression for pressure exerted by a gas ** -:- ** Degrees of Freedom ** -:- ** Law of Equipartition of Energy ** -:- ** Application of law of equipartition energy in specific heat of a gas ** -:- ** Solved Example Problems for Law of Equipartition of Energy ** -:- ** Mean Free Path ** -:- ** Solved Example Problems for Mean Free Path ** -:- ** Brownian Motion ** -:- ** Summary - Physics: Kinetic Theory of Gases ** -:- ** Solved Example Problems for Physics: Kinetic Theory of Gases ** -:- ** Multiple Choice Questions - Physics: Kinetic Theory of Gases**Chapter 10 Oscillations**

** -:- ** Oscillations ** -:- ** Simple Harmonic Motion (SHM) ** -:- ** The projection of uniform circular motion on a diameter of SHM ** -:- ** Displacement, velocity, acceleration and its graphical representation – SHM ** -:- ** Time period, frequency, phase, phase difference and epoch in SHM ** -:- ** Solved Example Problems for Simple Harmonic Motion (SHM) ** -:- ** Angular Simple Harmonic Motion ** -:- ** Time period and frequency of angular SHM(Simple Harmonic Motion) ** -:- ** Comparison of Simple Harmonic Motion and Angular Simple Harmonic Motion ** -:- ** Linear Simple Harmonic Oscillator (LHO) ** -:- ** Horizontal oscillations of a spring-mass system - Linear Simple Harmonic Oscillator (LHO) ** -:- ** Vertical oscillations of a spring - Linear Simple Harmonic Oscillator (LHO) ** -:- ** Combinations of springs - Linear Simple Harmonic Oscillator (LHO) ** -:- ** Oscillations of a simple pendulum in SHM and laws of simple pendulum ** -:- ** Solved Example Problems for Linear Simple Harmonic Oscillator (LHO) ** -:- ** Energy in Simple Harmonic Motion ** -:- ** Solved Example Problems for Energy in Simple Harmonic Motion ** -:- ** Types of Oscillations ** -:- ** Summary - Physics: Oscillations ** -:- ** Solved Example Problems for Physics: Oscillations ** -:- ** Multiple Choice Questions - Physics: Oscillations**Chapter 11 Waves**

** -:- ** Waves - Physics ** -:- ** Ripples and wave formation on the water ** -:- ** Formation of waves on stretched string ** -:- ** Formation of waves in a tuning fork ** -:- ** Characteristics of wave motion ** -:- ** Mechanical wave motion and its types ** -:- ** Terms and Definitions Used in Wave Motion ** -:- ** Solved Example Problems for Wave Motion ** -:- ** Velocity of Waves in Different Media ** -:- ** Velocity of transverse waves in a stretched string ** -:- ** Velocity of longitudinal waves in an elastic medium ** -:- ** Solved Example Problems for Velocity of Waves in Different Media ** -:- ** Propagation of Sound Waves ** -:- ** Newton’s formula for speed of sound waves in air ** -:- ** Laplace’s correction - Propagation of Sound Waves ** -:- ** Factors affecting speed of sound in gases ** -:- ** Solved Example Problems for Propagation of Sound Waves ** -:- ** Reflection of Sound Waves ** -:- ** Applications of reflection of sound waves ** -:- ** Solved Example Problems for Reflection of Sound Waves ** -:- ** Progressive Waves (or) Travelling Waves ** -:- ** Characteristics of progressive waves (or) Travelling Waves ** -:- ** Equation of a plane progressive wave (or) Travelling Wave ** -:- ** Graphical representation of the Progressive Wave (or) Travelling Wave ** -:- ** Particle velocity and Progressive wave velocity ** -:- ** Solved Example Problems for Progressive Waves (or) Travelling Waves ** -:- ** Waves Superposition Principle ** -:- ** Interference of waves ** -:- ** Formation of beats - Waves ** -:- ** Solved Example Problems for Waves Superposition Principle ** -:- ** Standing Waves or stationary waves ** -:- ** Explanation of stationary waves ** -:- ** Characteristics of stationary waves ** -:- ** Stationary waves in sonometer: Construction, Working and Example Problem ** -:- ** Fundamental frequency and overtones ** -:- ** Laws of transverse vibrations in stretched strings ** -:- ** Solved Example Problems for Stationary waves ** -:- ** Intensity and Loudness of sound ** -:- ** Solved Example Problems for Intensity and Loudness of sound ** -:- ** Vibrations of Air Column ** -:- ** Resonance air column apparatus ** -:- ** Solved Example Problems for Vibrations of Air Column ** -:- ** Doppler Effect ** -:- ** Applications of Doppler effect ** -:- ** Solved Example Problems for Doppler Effect ** -:- ** Summary - Physics: Waves ** -:- ** Solved Example Problems for Physics: Waves ** -:- ** Multiple Choice Questions - Physics: Waves**Chapter 12 Practical Experiment**

** -:- ** Moment of Inertia of a Solid Sphere of Known Mass Using Vernier Caliper ** -:- ** Non - Uniform Bending - Verification of Relation Between Load and Depression Using Pin and Microscope ** -:- ** Spring Constant of a Spring ** -:- ** Acceleration Due to Gravity Using Simple Pendulum ** -:- ** Velocity of Sound in Air Using Resonance Column ** -:- ** Viscosity of a Liquid By Stoke’s Method ** -:- ** Surface Tension By Capillary Rise Method ** -:- ** Newton’s Law of Cooling Using Calorimeter ** -:- ** Study of Relation Between Frequency and Length of a Given Wire Under Constant Tension Using Sonometer ** -:- ** Study of Relation Between Length of the Given Wire and Tension for a Constant Frequency Using Sonometer